Triple

T20121911
Position Surface form Disambiguated ID Type / Status
Subject Wakayama-shi Station E490629 entity
Predicate operator P179 FINISHED
Object Nankai Electric Railway — NE NERFINISHED

Named-entity recognition

Before disambiguation, gpt-5-mini classified whether the object phrase is a named entity — the step behind the object's NE type shown above.

Instruction
Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).
Input
Phrase: Nankai Electric Railway | Statement: [Wakayama-shi Station, operator, Nankai Electric Railway]

Disambiguation candidates (1 decision)

The exact options the model was shown at each disambiguation step, with the option it chose highlighted — the evidence behind this triple's disambiguated ids.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Nankai Electric Railway
Context triple: [Wakayama-shi Station, operator, Nankai Electric Railway]
  • A. Nankai Electric Railway chosen
    Nankai Electric Railway is a major private railway company in Japan’s Kansai region, operating key commuter and interurban lines connecting Osaka with Wakayama and Kansai International Airport.
  • B. Keihan Electric Railway Co., Ltd.
    Keihan Electric Railway Co., Ltd. is a major Japanese private railway operator serving the Osaka–Kyoto region, known for its extensive commuter rail network and related transportation and leisure businesses.
  • C. Keisei Electric Railway
    Keisei Electric Railway is a major private railway operator in the Greater Tokyo area, best known for linking central Tokyo with Chiba Prefecture and Narita International Airport.
  • D. Eizan Electric Railway
    Eizan Electric Railway is a Japanese private railway company in Kyoto that operates scenic local train lines connecting the city to the northern mountainous and temple-rich areas.
  • E. Sanyo Electric Railway
    Sanyo Electric Railway is a Japanese private railway company operating commuter rail services primarily in Hyōgo Prefecture, including routes that interconnect with other major regional rail networks.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (2 batches)

Stage Batch ID Job type Status
creating batch_69da62651a0c8190a3e05e95e056a66b elicitation completed
NER batch_69e6673f5b4c8190bf9fb5f4e6b6a452 ner completed
Created at: April 11, 2026, 11:30 p.m.